Capital One Senior Software Developer interview questions

Started off with a code signal challenge. There will be 4 questions which need to be solved in 70 minutes. First 2 were easy but need time to write a working solution. Next 2 were based on Print patterns and DFS+memoization concepts. I feel it's impossible to write working solutions in such a short amount of time for DFS+memoization question.

Process: Online Assessment - Recruiter call - Power day (System Design, Coding, Behavioral, Business Case) Overall process was good. I did well in coding, I was lacking in System Design and Business Case. Honestly this was my first time for Business case, they asked me to design a Virtual card system and followed by debugging the VCS code.